7 Answers
7

If they are suitable close they can be merged; flag them for moderator attention. For example, those that are web can probably be looked at to see if a merge is appropriate; but some others might not be; "User Interface Design Tool" isn't as web-specific, for example.

I didn't check all of them, but I'll take your word for it. It's very surprising that none of those got marked as a dupe. I'd suspect this sort of thing is the exception, not the rule; usually somebody catches it. I guess there aren't a lot of people marking gui as a favorite tag.

All you can do is vote to close and add dupe links to them. It's going to be difficult for anyone but the moderators merge the answers, which is what ought to be done.

These questions should all be tagged appropriately so they come up together in the related questions sidebar.

As I've said before, people will ask the same questions using zero words in common. We need duplicates -- linked through topic specific tags -- so they're findable depending on which of the 5 different ways of asking is the way you will happen to ask.

I say don't go cowboy with closing/merging duplicates - make sure you know what you're doing as otherwise you can mix-up benefits such as favourites etc. EG: If you have 3 questions, each heavily favourited, be very very careful before merging/deleting as you would be destroying some intrincic value that SO delivers by answering subtle aspects.

Licensing is just such a subject and two questions may look the same, and could in fact be the opposite. GPL and LGPL are opposites in terms of use in commercial software but both are called free.